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Oscar D. Ratnoff
Oscar Davis Ratnoff (August 23, 1916 – May 20, 2008) was an American physician who conducted research on the process of coagulation and blood-related disorders. Ratnoff discovered the substance later known as Factor XII and was one of the primary contributors to the delineation of the exact sequence that makes up the clotting cascade. He also made notable research contributions to the understanding of the complement system and to the detection and treatment of hemophilia. Ratnoff was a professor at the Case Western Reserve University School of Medicine, served as president of the American Society of Hematology, and was elected to the National Academy of Sciences. He remained active in research at Case Western Reserve until he was 85 and he died in Cleveland a few years later. Early life Ratnoff was born prematurely, the son of a New York pediatrician. Ratnoff's father was an associate of notable pediatrician Henry Koplik. Koplik advised Ratnoff's father that the newborn h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the List of United States cities by population density, most densely populated major city in the United States, and is more than twice as populous as second-place Los Angeles. New York City lies at the southern tip of New York (state), New York State, and constitutes the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the world by urban area, urban landmass. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York is one of the world's most populous Megacity, megacities, and over 58 million people live within of the city. New York City is a global city, global Culture of New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Bradford Cannon
Walter Bradford Cannon (October 19, 1871 – October 1, 1945) was an American physiologist, professor and chairman of the Department of Physiology at Harvard Medical School. He coined the term "fight or flight response", and developed the theory of homeostasis. He popularized his theories in his book ''The Wisdom of the Body'', first published in 1932. Life and career Cannon was born on October 19, 1871, in Prairie du Chien, Wisconsin, the son of Colbert Hanchett Cannon and his wife Wilma Denio. His sister Ida Maud Cannon (1877-1960) became a noted hospital social worker at Massachusetts General Hospital. In his autobiography ''The Way of an Investigator'', Cannon counts himself among the descendants of Jacques de Noyon, a French Canadian explorer and coureur des bois. His Calvinist family was intellectually active, including readings from James Martineau, John Fiske (philosopher), and James Freeman Clarke. Cannon's curiosity also led him to Thomas Henry Huxley, John Tyndall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Contaminated Haemophilia Blood Products
Contaminated hemophilia blood products were a serious public health problem in the late 1970s up to 1985. These products caused large numbers of hemophiliacs to become infected with HIV and hepatitis C. The companies involved included Alpha Therapeutic Corporation, Institut Mérieux (which then became Rhone-Poulenc Rorer Inc., and is now part of Sanofi), Bayer Corporation and its Cutter Biological division, Baxter International and its Hyland Pharmaceutical division. Estimates range from 6,000 to 10,000 hemophiliacs in the United States becoming infected with HIV. Factor VIII is a protein that helps the clotting of blood, which hemophiliacs, due to the genetic nature of their condition, are unable to produce themselves. By injecting themselves with it, hemophiliacs can stop bleeding or prevent bleeding from starting; some use it as often as three times a week. Initial concerns In 1981 concern was growing over an unidentified infectious disease associated with immune system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Von Willebrand Disease
Von Willebrand disease (VWD) is the most common hereditary blood-clotting disorder in humans. An acquired form can sometimes result from other medical conditions. It arises from a deficiency in the quality or quantity of von Willebrand factor (VWF), a multimeric protein that is required for platelet adhesion. It is known to affect several breeds of dogs as well as humans. The three forms of VWD are hereditary, acquired, and pseudo or platelet type. The three types of hereditary VWD are VWD type 1, VWD type 2, and VWD type 3. Type 2 contains various subtypes. Platelet type VWD is also an inherited condition. In 2008 a new diagnostic category of "Low VWF" was proposed to include those individuals whose von Willebrand factor levels were below the normal reference range but not low enough to be von Willebrand disease (levels in the 30-50 IU/dL range). Patients with low VWF can experience bleeding, despite mild reductions in VWF levels. VWD type 1 is the most common type of the dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemophilia A
Haemophilia A (or hemophilia A) is a genetic deficiency in clotting factor VIII, which causes increased bleeding and usually affects males. In the majority of cases it is inherited as an X-linked recessive trait, though there are cases which arise from spontaneous mutations. Factor VIII medication may be used to treat and prevent bleeding in people with haemophilia A. Signs and symptoms In terms of the symptoms of haemophilia A, there are internal or external bleeding episodes. Individuals with more severe haemophilia have more severe and more frequent bleeding, while others with mild haemophilia typically have more minor symptoms except after surgery or serious trauma. Moderate haemophiliacs have variable symptoms which manifest along a spectrum between severe and mild forms. Prolonged bleeding from a venepuncture or heelprick is another common early sign of haemophilia, these signs may lead to blood tests which indicate haemophilia. In other people, especially those with modera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assay
An assay is an investigative (analytic) procedure in laboratory medicine, mining, pharmacology, environmental biology and molecular biology for qualitatively assessing or quantitatively measuring the presence, amount, or functional activity of a target entity. The measured entity is often called the analyte, the measurand, or the target of the assay. The analyte can be a drug, biochemical substance, chemical element or compound, or cell in an organism or organic sample. An assay usually aims to measure an analyte's intensive property and express it in the relevant measurement unit (e.g. molarity, density, functional activity in enzyme international units, degree of effect in comparison to a standard, etc.). If the assay involves exogenous reactants (the reagents), then their quantities are kept fixed (or in excess) so that the quantity and quality of the target are the only limiting factors. The difference in the assay outcome is used to deduce the unknown quality or quantity o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Oxford
, mottoeng = The Lord is my light , established = , endowment = £6.1 billion (including colleges) (2019) , budget = £2.145 billion (2019–20) , chancellor = The Lord Patten of Barnes , vice_chancellor = Louise Richardson , students = 24,515 (2019) , undergrad = 11,955 , postgrad = 12,010 , other = 541 (2017) , city = Oxford , country = England , coordinates = , campus_type = University town , athletics_affiliations = Blue (university sport) , logo_size = 250px , website = , logo = University of Oxford.svg , colours = Oxford Blue , faculty = 6,995 (2020) , academic_affiliations = , The University of Oxford is a collegiate research university in Oxf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Gwyn Macfarlane
Robert Gwyn Macfarlane (26 June 1907 – 26 March 1987) was an English hematologist. Life Born in Worthing, Sussex, Gwyn Macfarlane left Cheltenham College in 1924 and a year later entered the Medical School of St Bartholomew's Hospital, London. In 1936 he married Hilary Carson MD and over the next 11 years had five children, a girl followed by four boys. Hilary practised as a GP, whilst always offering Gwyn great academic support. She died in 2010 aged 100 years. During Macfarlane's clinical years he was exposed to the sufferings of haemophiliacs and this subject became the core for his lifelong study into the processes of blood clotting. He examined the venom of many different snakes and isolated the poison of the Russell's viper to have the strongest blood coagulant powerssee video He found that when a compound that included venom at dilutions of 1 in 100,000 was applied to a wound, bleeding diminished. This medicine was later marketed as ''Stypven'' by Burroughs W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earl Davie
Earl Warren Davie (October 25, 1927 - June 6, 2020) was an American biochemist. He was a professor emeritus of biochemistry at the University of Washington. Davie studied the blood proteins involved in coagulation and was among the first scientists to describe the steps of the clotting process. He was a member of the National Academy of Sciences and a fellow of the American Academy of Arts and Sciences. Early life Davie was born on October 25, 1927, in Tacoma, Washington, to Charles and Teckla Davie. He grew up in La Grande, Washington and attended Eatonville High School. He received an undergraduate degree in 1950 from the University of Washington, where he had worked in the laboratory of biochemistry professor Donald Hanahan. He completed a Ph.D. at UW in 1954. During his doctoral studies, Davie worked with Hans Neurath to learn about protein structure and function. Career After a postdoctoral fellowship with Fritz Lipmann at Harvard Medical School, Davie worked at th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clotting Time
Clotting time (also called Prothrombin time) is the time required for a sample of blood to coagulate in vitro under standard conditions. There are various methods for determining the clotting time, the most common being the capillary tube method. It is affected by calcium ion levels and many diseases. The normal range of clotting times is 2-8 minutes. For the measurement of clotting time by the test tube method, blood is placed in a glass test tube and kept at 37° C. The required time for the blood to clot is measured. There are several other methods, including testing for those on blood thinners, such as heparin or warfarin. Activated partial thromboplastin time (aPTT) is used for heparin studies and the normal range is 20–36 seconds, depending upon which type of activator is used in the study. Prothrombin time (PT) is used for warfarin studies and the normal values differ for men and women. Adult male PT normal range is 9.6–11.8 seconds, while adult females' normal range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest William Goodpasture
Ernest William Goodpasture (October 17, 1886 – September 20, 1960) was an American pathologist and physician. Goodpasture advanced the scientific understanding of the pathogenesis of infectious diseases, parasitism, and a variety of rickettsial and viral infections. Together with colleagues at Vanderbilt University, he invented methods for growing viruses and rickettsiae in chicken embryos and fertilized chicken eggs. This enabled the development of vaccines against influenza, chicken pox, smallpox, yellow fever, typhus, Rocky mountain spotted fever, and other diseases. He also described Goodpasture syndrome.Valentini, Rudolph PPediatric Anti-GBM Disease (Goodpasture Syndrome). Accessed 8-28-2009. Education and professional career Goodpasture was born in Clarksville, Tennessee, in 1886. He received his B.A. from Vanderbilt University in 1908. In 1912, Goodpasture graduated from Johns Hopkins School of Medicine with an M.D. degree. There, under professors William H. Welch an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrhosis
Cirrhosis, also known as liver cirrhosis or hepatic cirrhosis, and end-stage liver disease, is the impaired liver function caused by the formation of scar tissue known as fibrosis due to damage caused by liver disease. Damage causes tissue repair and subsequent formation of scar tissue, which over time can replace normal functioning tissue, leading to the impaired liver function of cirrhosis. The disease typically develops slowly over months or years. Early symptoms may include tiredness, weakness, loss of appetite, unexplained weight loss, nausea and vomiting, and discomfort in the right upper quadrant of the abdomen. As the disease worsens, symptoms may include itchiness, swelling in the lower legs, fluid build-up in the abdomen, jaundice, bruising easily, and the development of spider-like blood vessels in the skin. The fluid build-up in the abdomen may become spontaneously infected. More serious complications include hepatic encephalopathy, bleeding from dilated veins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
